Supercharger casing



Jan. 10, 1933. w. NOBLE 1,894,054

SUPERCHARGER CASING Filed Sept. 21. 1928 2 Sheets-Sheet .'1

gmanto'z Wa we/W Jan. 10, 1933. w, NOBLE 1,894,054

SUPERCHARGER CAS ING Filed spt. 21, 1928 2 Sheets-Sheet 2 atto'tweqPatented Jan. 19, 1933 ATENT WARREN NOBLE, 0F DETROIT, MICHIGANSUERCHARGER CASING Application filed September 21, 1928.

This invention relates to superchargers or rotary induction means andparticularly to the casings thereof, and has for its object to provide acasing which will be eflicient in gas distributing action, cheap tomanufacture and capable of permitting an outlet therefrom at a pluralityof points in order to equalize pressures in the inlet manifold of anengine.

Heretofore it has been customary to build a spiral or snail shapedcasing having fixed guide vanes therein. The drawbacks to such astructure are that only one outlet can be effectively had therefrom sothat in using a ring manifold as, for instance, in a radial engine,there is always diiiiculty in getting a charge in the cylinders furthestfrom the supercharger approximating that in those cylinders adjacent thesupercharger; and also that the conventional structure is ratherdifiicult and expensive to manufacture, due to the fixed vanes, and tothe odd shape.

It has been found in practice that it is possible to obtain resultswhich compare very favorably with those obtained by the conventionaltype by using such a fan as described in my copending application,Serial Number 507,517, filed September 21, 1928, in conjunction with amore or less oval shape casing and allowing a substantial distancebetween the narrow portion of said casing and said blade tips. While itis not necessary to use the fan described in the copending applicationabove referred to, its use serves to illustrate the efficiency of thecasing herein described, because of the lack of blade tip air scoops onsaid fan, so that in view of the fact that it operates efficiently withthis type fan it will operate very efiiciently with the types of fansnow in use.

In the supercharger it is necessary to convert the kinetic energy ofmotion possessed by the gas or air into pressure. In order t accomplishthis it is first necessary to get sufficient volume by the action of theblades Serial No. 307,518.

and then to build up a pressure in the mani fold by means of inner airscoops traveling at high velocity. It is found that it is not necessaryto stop the gases as by the use of fixed vanes, but that by merelypermitting the gases to flow into an odd shaped casing, such as the oneshown herein, they may be readily picked up by the throats of the fanhub in combination with the fan blades and thereupon put under pressureas indicated.

Since this condition is true, there is no reason for the use of a snailshaped structure, hence the air or gas under pressure may be taken offat two different points in the casing. Thus a ring manifold may be fedfrom both directions, so that the total distance of feeding any cylinderis exactly the same as the total distance of feeding for every othercylinder and an even charge is assured in every cylinder.

Such a casing may be stamped or cast very readily, so that the cost ofmanufacture is greatly reduced.

A better understanding of the invention will be had with reference tothe accompanying drawings, wherein:

Figure 1 is a view in side elevation of a supercharger casing accordingto the present invention, parts being broken away to show interiorconstruction.

Fig. 2 is a view taken at right angles to Fig. 1, the casing being shownpartly in ele vation and partly in section.

Fig. 3 is a sectional view taken vertically through the axis of thestructure shown in Fig. 2, the casing being shown attached to theengine.

Referring more particularly to the drawingsz Numeral 1 indicates asupercharger casing attached to an engine by bolts 2. The casing 1 has aperipheral channel 3, preferably more or less rectangular in crosssection as shown in Figures 1 and 3. Detachably mounted on the channelis a gas or air inlet passage l, which is of substantially cylindricalshape and flared outwardly at to engage the sides of the casing channeland to be secured thereto by means of bolts 6. lVitliin casing 5 is afan 7 mounted on a shaft 8, which is driven by a gear 9. Blades 10 offan 7 are so shaped as to assume the general contour of the flaredportion 5 of inlet passage l, and to terminate at the channel inlet.

Casing 5 may be br adly described as bein of an oval shape so that avertical section thru its axis will show a diameter equal to thediameter of the fan, plus the width of channel 3, while a horizontalsection thru the axis will show a diameter substantially larger. At eachof the enlarged ends I provide takeoffs or outlets 11 leading to amanifold 12, which may be a ring manifold and hence close on itself sothat gas under pres sure is fed from two directions therein. Equalpressure is insured in the manifold by a connecting passage 13.

In operation, air or gas at high velocity enters at 4 and is driveninwardly by the airscoops on fan blades T against the walls of channel 3where it put unc or pressure by lb the action of fan blades 7, togetherwith the fan blade throats, and is then forced thru outlets 11 intomanifold 12.

The term supercharger is used herein and in the claims is intended toinclude rotary induction means.

While I have illustrated only one embodiment of my invention it will beunderstood that various changes may be made without departing from thespirit of the invention, and I therefore desire to be limited only bythe scope of the appended claims, in which:

I claim:

1. In combination, a ring inlet manifold and means for equalizing thepressure at various points in said manifold, said means comprising aplurality of inlets adapted to inlet a fluid in opposed direction atdifferent points around said manifold.

2. In combination, a ring inlet manifold for an internal combustionengine and means for equalizing the pressure at various points in saidmanifold, said means comprising a supercharger casing interposed in saidmanifold, said casing having a plurality of outlets feeding saidmanifold at a plurality of points said outlets directing air therefromin opposite direction.

3. In combination, a ring inlet manifold and means for equalizing thepressure at various points in said manifold, said means comprising asupercharger casing interposed in said manifold, said casing having aplurality of inlets each feeding said manifold in a direction opposed toanother inlet.

4. In combination, a ring inlet manifold for an internal combustionengine and means for equalizing the pressure at various points in saidmanifold, said means comprising a supercharger casing interposed in saidmanifold, said casing being of elliptical conformation and having anoutlet at each end of the greatest diameter thereof, said outletsfeeding air to said manifold from opposite directions.

5. In combination, an inlet manifold having a plurality of widelyseparated inlets and a supercharger casing attached to said manifold,said casing having a plurality of outlets coinciding with the inlets insaid manifold whereby air is fed into said manifold from a plurality ofpoints in an opposed direction to equalize the pressure therein.

In testimony whereof I afiix my signature.

WARREN NOBLE.

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